Any iOS app has a ton of competition within its category for a many-times larger audience. Any macOS app has very little competition for a tiny audience. 36k do

Any iOS app has a ton of competition within its category for a many-times larger audience. Any macOS app has very little competition for a tiny audience. 36k downloads can mean that you've captured a larger audience on one platform than the other, and that seems more reasonable than the conclusion that the audience sizes are the same.